Compatible Chain Size: 1/4" (also fits 9/32" Grade 70 / Grade 80 chain) Working Load Limit (WLL): 2,750 lbs (1.38 tons) up to 3,500 lbs depending on the rating standard Design Safety Factor: 4:1Attachment Type: Clevis pin configuration for quick, secure linking Lifting Restriction: NOT intended for overhead lifting. It must not be used with chain slings for overhead crane work.